How to make a car door hinge upwards?
You can add an &quot;Empty&quot;-object to where your 3D-Cursor now is. This you can rotate so that one of its axes aligns with the desired axis of rotation.
Then, select the door, select the Empty and press &quot;Crtl - P&quot; to parent the door to the empty.
With the transform mode set to &quot;Local&quot;, you can then rotate the empty and the door along with it around the desired axis